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GB/T 28112-2011 English PDF

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GB/T 28112-2011: Determination of residual dimethylcyclosiloxane volatiles in silicone rubber
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GB/T 28112-2011English229 Add to Cart 3 days [Need to translate] Determination of residual dimethylcyclosiloxane volatiles in silicone rubber Valid GB/T 28112-2011

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Basic data

Standard ID GB/T 28112-2011 (GB/T28112-2011)
Description (Translated English) Determination of residual dimethylcyclosiloxane volatiles in silicone rubber
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G34
Classification of International Standard 83.060
Word Count Estimation 10,184
Date of Issue 2011-12-30
Date of Implementation 2012-10-01
Quoted Standard GB/T 8170-2008; GB/T 14838-2009; GB/T 15340-2008
Adopted Standard ASTM F2466-2005, NEQ
Regulation (derived from) Announcement of Newly Approved National Standards No. 23 of 2011
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the gas chromatographic determination of residual silicone rubber raw rubber ring of volatile methyl siloxanes D4 (Octamethyl siloxane) ~ D10 (twenty ten ring methyl siloxane) content of the principle and test methods. This standard applies to silicone rubber raw rubber, hexamethyldisiloxane (D4 ~ D10) single-component detection limit was 50mg/kg.

GB/T 28112-2011: Determination of residual dimethylcyclosiloxane volatiles in silicone rubber

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Determination of residual dimethylcyclosiloxane volatiles in silicone rubber ICS 83.060 G34 National Standards of People's Republic of China Silicone rubber volatile methyl siloxane ring Determination of residues Issued on. 2011-12-30 2012-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard with the American Society for Testing Materials Standards ASTMF2466-05 "Transport silicone rubber silicone volatiles standard measurement Practice, "the non-equivalent. The presence of the following standards and technical differences compared ASTMF2466-05. --- Different ranges apply. This standard applies to silicone raw rubber, while ASTMF2466-05 applicable to vulcanized silicone rubber products. --- Different extraction agent. This standard uses acetone as an extracting agent, and ASTMF2466-05 using n-pentane as the extraction agent. --- Different detector works. The standard gas chromatography flame ionization detector (FID) detection method, ASTM F2466-05 by GC thermal conductivity detector (TCD) detection method. --- The standard selection decamethylcyclopentasiloxane siloxane (D5) or twelve six methyl siloxane ring (D6) as one of the standard, n-tetradecane Hydrocarbons (n-C14H30) or n-dodecane (n-C12H26) as an internal standard one, was tested with the standard relative to the internal standard Correction factor, the determination of silicon rubber adhesive residual volatile methyl siloxane ring (D4 ~ D10) content in the standard method. ASTM F2466-05 need seven hexamethyldisiloxane (D4 ~ D10) and n-dodecane total of eight standard samples in Volatile Of hexamethyldisiloxane (D4 ~ D10) was quantified. --- Qualitatively different form of standard control samples. This standard uses a mixed methyl siloxane ring (D4 ~ D10) standard still Products, and ASTMF2466-05 Methods D4 ~ D10 seven separate hexamethyldisiloxane standard sample. --- Increased gas chromatography - mass spectrometry (GC-MS) qualitative methods. --- Increasing the precision of the method. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Rubber and rubber products Standardization Technical Committee (SAC/TC35) centralized. This standard was drafted. Zhongshan University Testing Center, China Research Institute of Petroleum Chemical Industry Co., Ltd.. Drafters of this standard. Xie Xi Mei, Lu Huining, Sun Lijun, Qin Peng. Silicone rubber volatile methyl siloxane ring Determination of residues WARNING 1 --- personnel should use this standard regular laboratory work experience. This standard does not point out all possible security problem. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations. Warning 2 --- some of the steps of the standard substances and waste generated in the local environment may be damaged. An after use should be developed Documents the whole process.

1 Scope

This standard specifies the determination by gas chromatography silicone raw rubber residual volatile hexamethyldisiloxane D4 (octamethylcyclotetrasiloxane siloxane) ~ D10 (twenty-methyl siloxane ring ten) principles and test methods for the content. This standard applies to silicone gum, methyl siloxane ring (D4 ~ D10) single-component minimum detectable amount of 50mg/kg.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 8170-2008 revised value represents about rules and limit values \u200b\u200band judgment GB/T 14838-2009 Rubber and rubber products - Determination of precision for test method standards (ISO /T R9272.2005, IDT) GB/T 15340-2008 natural and synthetic rubber raw sampling and sample preparation method (ISO 1795.2000, IDT) Principle 3 Anhydrous sodium sulfate dispersed silicone rubber adhesive samples, and then soaked in acetone, volatile methyl silicone ring wherein ultrasonic extraction residues Alkyl, gas chromatography flame ionization detector (FID) detection. Qualitative mixed methyl siloxane ring (D4 ~ D10) of reference standards Retention time qualitative or GC-MS characterization. According hexamethyldisiloxane same hydrocarbon composition ratio of each component of the same quality as methyl cyclosila Siloxane consistent response on the FID detector to decamethylcyclopentasiloxane siloxane (D5) or twelve six methyl siloxane ring (D6) as a standard, Fourteen n-paraffins (n-C14H30) or n-dodecane (n-C12H26) as internal standard to determine the relative calibration factor. Determination by internal standard method each The residual amount of methyl cyclosiloxanes.

4 Instrument

Conventional laboratory equipment and the following. 4.1 Gas Chromatograph (GC). with autosampler or manual injection device, equipped with a flame ionization detector (FID), to meet the analysis Requirements; qualitative analysis can also be used by gas chromatography - mass spectrometry (GC-MS). 4.2 Capillary column. 100% non-polar highly inert dimethylpolysiloxane crosslinked capillary column DB-1 (30m × 0.25mm × 0.25μm), it can also be used to achieve other equivalent separation of non-polar capillary column. 4.3 Data processing system. chromatographic integrator or chromatography workstation. 4.4 Analytical balance. accurate to 0.1mg.

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